Vermont Sen. Patrick Leahy said he doesn't know how anyone could respect Alabama Senate candidate Roy Moore.
When asked by a reporter how the Senate would change if Roy Moore was elected, Leahy said he didn't "even want to think of it. It's such a nightmare."
Moore, a Republican, is running for the Senate seat that opened up when Jeff Sessions became Attorney General.
Leahy said he has a lot of respect for his colleagues in the Senate.
"I have a lot of respect for senators, both Republicans and Democrats," Leahy said. "Everything I've heard about him [Moore], his refusal to follow court orders, his refusal to obey the law, his bragging about not obeying the law - I couldn't serve with him with respect."
Residents in Alabama will vote in the senate race between Moore and Democratic nominee Doug Jones Tuesday.